"It's connected to a violent sub-culture. But we bear some responsibility. Sometimes as adults we don't model the behaviour we would want youngsters to follow. We live in a greedy culture, we are rude to each other in the street. Children follow that. You wonder what has gone wrong in these children's lives. Of course the kids have a responsibility, but there are questions about what's going on at home. Parents have a huge responsibility. Government doesn't bring up children, parents do."